comparing post-reconnection energetic electron and ion signatures in earth’s inner magnetosphere...
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![Page 1: Comparing Post-Reconnection Energetic Electron and Ion Signatures in Earth’s Inner Magnetosphere and Near the Sun Harlan E. Spence and Nathan A. Schwadron](https://reader036.vdocuments.us/reader036/viewer/2022062421/56649d7e5503460f94a61279/html5/thumbnails/1.jpg)
Comparing Post-Reconnection Energetic Electron and Ion Signatures in Earth’s Inner
Magnetosphere and Near the Sun
Harlan E. Spenceand
Nathan A. Schwadron
Boston UniversityCenter for Space Physics
![Page 2: Comparing Post-Reconnection Energetic Electron and Ion Signatures in Earth’s Inner Magnetosphere and Near the Sun Harlan E. Spence and Nathan A. Schwadron](https://reader036.vdocuments.us/reader036/viewer/2022062421/56649d7e5503460f94a61279/html5/thumbnails/2.jpg)
• RHESSI observations (2003) spatially-resolve for first time the locations of electron and ion acceleration in solar flares
• Comparison of ion (neutron capture) and electron (bremsstrahlung) proxies reveals dislocation of accelerated electron and ion populations near the Sun
![Page 3: Comparing Post-Reconnection Energetic Electron and Ion Signatures in Earth’s Inner Magnetosphere and Near the Sun Harlan E. Spence and Nathan A. Schwadron](https://reader036.vdocuments.us/reader036/viewer/2022062421/56649d7e5503460f94a61279/html5/thumbnails/3.jpg)
Excerpts from Hurford’s discovery paper
Sola
r limb
Ion sites (circles)
Electron sites (contours)
![Page 4: Comparing Post-Reconnection Energetic Electron and Ion Signatures in Earth’s Inner Magnetosphere and Near the Sun Harlan E. Spence and Nathan A. Schwadron](https://reader036.vdocuments.us/reader036/viewer/2022062421/56649d7e5503460f94a61279/html5/thumbnails/4.jpg)
• Initial RHESSI results affirmed in Hurford et al.’s (2006) publication
• Three additional flares possess similar accelerated electron/ion location phenomenology
![Page 5: Comparing Post-Reconnection Energetic Electron and Ion Signatures in Earth’s Inner Magnetosphere and Near the Sun Harlan E. Spence and Nathan A. Schwadron](https://reader036.vdocuments.us/reader036/viewer/2022062421/56649d7e5503460f94a61279/html5/thumbnails/5.jpg)
• Gradient/curvature drift separation explored and rejected
• Displacements still not adequately explained
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• Inner magnetosphere substorm injections have similar phenomenology
• Phenomena has been well studies observationally and recently through MHD modeling and test particle simulation
![Page 7: Comparing Post-Reconnection Energetic Electron and Ion Signatures in Earth’s Inner Magnetosphere and Near the Sun Harlan E. Spence and Nathan A. Schwadron](https://reader036.vdocuments.us/reader036/viewer/2022062421/56649d7e5503460f94a61279/html5/thumbnails/7.jpg)
• Birn et al.’s (1997, 1998) simulations reproduce observed features well
Earthward collapsing field
lines
Noon-midnightmeridian
Electrons displaced to east
Ions displaced to west
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Substorm Life Cycle